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//  Copyright Microsoft Corporation
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//  http://www.apache.org/licenses/LICENSE-2.0
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//  distributed under the License is distributed on an "AS IS" BASIS,
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//  See the License for the specific language governing permissions and
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namespace DurableTask.AzureStorage.Messaging
{
    using System;

    class ActivitySession : SessionBase
    {
        readonly int orchestrationEpisode;

        public ActivitySession(
            AzureStorageOrchestrationServiceSettings settings,
            string storageAccountName,
            MessageData message,
            Guid traceActivityId)
            : base(settings, storageAccountName, message.TaskMessage.OrchestrationInstance, traceActivityId)
        {
            this.MessageData = message ?? throw new ArgumentNullException(nameof(message));
            this.orchestrationEpisode = message.Episode ?? -1;
        }

        public MessageData MessageData { get; }

        public override int GetCurrentEpisode()
        {
            return this.orchestrationEpisode;
        }
    }
}
